... not least, the Zodiac made references to the "radian" in one of his letters to the police. He also mentioned Mount Diablo in the same letter. When a radian was traced onto a piece of transparency paper, and then intersected with Mount Diablo, the resultant legs of the radian passed through every Zodiac murder location, even 400 miles to the south where Cheri Jo ... ...

• Word Count: 2766
• Approx Pages: 11
• Has Bibliography
• Grade Level: High School

... not least, the Zodiac made references to the "radian" in one of his letters to the police. He also mentioned Mount Diablo in the same letter. When a radian was traced onto a piece of transparency paper, and then intersected with Mount Diablo, the resultant legs of the radian passed through every Zodiac murder location, even 400 miles to the south where Cheri Jo ... ...

• Word Count: 2768
• Approx Pages: 11
• Grade Level: High School